Valve for explosive-engines.



No. 666,4I4. Patented Jam 22, I90I. $.2H. DYER. VALVE FOB EXPLOSIVEENGINES.

(Application filed Jan. 26. 1900.;

2 Sheets-Shoel I.

No Model.)

IN van 1" DH W'ITNEEEEE'I mamfggom UNITED States ATENT Fries.

SILAS l-I. DYER, OF PAWTUOKET, RHODE ISLAND, ASSIGNOR OF ONE-HALF TOEDMUND IV. ORSWELL, OF SAME PLACE.

VALVE FOR EXPLOSlVE-ENGINES.

SPECIFICATION formingpart of Letters Patent No, 666,414, dated January22, 1901.

Application filed January 26,1900. Serial No. 2,878. (No model.)

To ctZZ whom it may concern.-

Be it known that I, SILAS H. DYER, a citizen of the United States,residing at Pawtucket, in the county of Providence and State of RhodeIsland, have invented a new and useful Improvementin Gas-Engines, ofwhich the following is a specification.

This invention has reference to an improved valve for controlling thesupply, the com pression, and the exhaust of gas in a gas-engine; and itconsists in the peculiar and novel construct-ion of the valve and thecombination of the parts of the engine with the valve, as will be morefully set forth hereinafter.

In a gas-engine the supply and the exhaust of the gas are controlled byvalves, more or less injuriously affected by the explosion of the gas.

The main object of this invention is to provide a valve controlling theadmission and the exhaust of the gas not injuriously afiected by theexplosion of the gas, which valve is controlled positively from a movingpart of the gas-engine.

In illustrating the invention 1 have shown myimproved valve inconnection with a wellknown form of vertical gas-engine in the preferredform as a rotary valve; but I do not wish to confine myself to the exactconstruction of the valve or the connections by which the valve isoperated.

Figure 1 is a side view of a gas-engine. Fig. 2 is a View at a rightangle to Fig. 1, showing the cylinder in section. Fig. 3 is a top viewof the cylinder and the valve-chest of the gasengine. Fig. 4 is avertical sectional view of the cylinder-head and valve-chest. Fig. 5 isa perspective view of my improved valve. Fig. 6 is a diagrammatic viewillustrating the operation of the valve.

In the drawings, A indicates the base of a vertical gas-engine; A, thecylinder of the same; A the frame supporting the cylinder and ways onwhich the cross-head slides; A the piston connected by the piston-rodwith the cross-head A A the crank-disk on one end of the crank-shaft,supported in the pillow-block A, the fly-wheel A being secured to theother end of the crank-shaft in the usual manner; B, the cylinder-head,and B the valve-chest. These are illustrated in the drawings as made inone piece and contain the cylindrical chamber B for the improved rotaryvalve, the d u ct B to which the gas-supply is connected, the duct B,forming the exhaust-channel, and the duct B ,connecting the valve withthe upper end of the cylinder.

In the preferred form the valve 0 consists of the two disks 0 and Origidly secured together by a central boss or formed of one piece ofmetal. The disk 0* is provided with the opening C located on the disk,so that in rotating the opening 0 will at predetermined intervalsregister with the openings of the ducts l3 and B and connect these duetswith the annular space between the two disks C and 0 In Figs. 1 and 2and in the diagrammatic Fig.6 I have illustrated the connection andoperation of my improved valve in a gas-engine in which the gas is drawninto the cylinder at the downward movement of the piston, is compressedat the upward movement of the piston, then exploded to drive the pistondown, and exhausted at the return or upward movement of the piston, thevalve being rotated once for every two revolutions of the crank-disk Aand fly-Wheel A To this end the valve 0 is secured to the valve-stem 0to the lower part of which the bevel-gear C is secured. The bevel-gear Cengages with the bevel-gear 0 secured to the crank-shaft, so that atevery two revolutions of the crankshaft the gear 0 and the valve 0 arerotated once.

B is a cap secured to the valve-chest, by which access may be had to thevalve-chamber B In the operation of the valve and engine- 9o theinstantthe explosion takes place the opening (3 in the disk 0 is in theposition shown in Figs. 3 and 4, with the exhaust-duct and thegas-supply duct closed. The space between the two disks O and O is incommuni- 5 cation with the cylinder through the duct B The force of theexplosion acts equally on the two disks 0' and C of the valve and on thepiston A to drive it down the full length of the stroke. During thereturning stroke of the piston the opening 0 passes over theexhaust-duct B to allow the spent gases to be forced out of thecylinder. At the next down or out stroke of the piston the gas, mixedwith air, enters the cylinder through the duct B across which theopening 0 passes, and at the following inward or upward stroke of thepiston the gas is compressed to be exploded in the usual manner at theend of or immediately after the end of the inward or upward stroke ofthe piston.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent-- 1. In agas-engine, a valve consisting of two circular disks secured to therotatable valve-ste1n a sufficient distance apart to form between thetwo disks an explosion-chamber, and an opening in one of the two disksregistering with a gas supply and an exhaust d not; whereby the supplyand the exhaust are controlled by the same disk, as described.

2. In a gas-engine, the combination with the cylinder, the piston, acylindrical valvechest on one side of the cylinder, a duct connectingthe valve-chamber with the cylinder, at gas-supply duct and anexhaust-duct, both connecting with the same end of the valvechest, oftwo circular disks secured to the valve-stem a sufficient distance apartto form an explosion-chamber, one of said disks having an openingregistering successively with the gas supply and the exhaustdncts;whereby the force of the explosion is exerted on and balanced by the twodisks rigidly secured to each other, as described. 1

3. In a gas-engine, a rotary valve consisting of two circular platessecured together and to the valve-stem, an opening in one of saidcircular plates registering atpredetermined intervals with the gassupply and the exhaust ducts, whereby the force of the explosion exertedon the opposite surfaces of the valve is balanced, as described.

4. In a gas-engine, the combination with the cylinder, the gas-supplyduct, and the exhaust-duct, of a rotary valve consisting of two diskssecured together and to the rotatable valve-stem a sufficient distanceapart to form the explosion-chamberbetween the two disks, an opening inone of the disks located to register with the gas supply and exhaustducts, aduct connecting, the space between the valve-disks with thecylinder, and means for rotating the valve; whereby the gas sup ply andexhaust are controlled by one of the two disks of the valve, asdescribed.

5. In a gas-engine, the combination with the cylinder, the piston, thecrank-shaft, and connections between the piston and the crankshaft, of acylinder-head and valve-casing, a duct connecting the cylinder with thevalvecasing, an exhaust-duct, a gas-supply duct terminating in the sameend of the valve-casing, a valve consisting of two disks securedtogether, an opening in one of the disks located so that it may registerwith the gassupply and gas-exhaust ducts, means for operating the valve,and a cap secured to the end of the valve-chamber; whereby access to thevalve is secured, as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SILAS H. DYER.

Witnesses:

B. M. SIMMs, J. A. MILLER, J 1'.

